Mechanical Engineering Question:

What does F.O.F. stand for in piping design?

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Answer:

FOF stands for Face of Flange. A flange has either of the two types of faces:

* a) Raised face
* b) Flat face

The F.O.F is used to know the accurate dimension of the flange in order to avoid the minute errors in measurement in case of vertical or horizontal pipelines.

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